** Shares of Rio Tinto RIO.AX fall 2.7% to A$118.660
** Stock set for biggest intraday fall since February 3
** The world's largest iron ore producer posts full-year underlying earnings of $10.87 billion, its lowest in five years, hurt by lower iron ore prices
** Co posts its lowest FY dividend since 2019
(Reporting by Nichiket Sunil in Bengaluru)
((Nichiket.Sunil@thomsonreuters.com;))